The issue with Israel isn't the quality of their weapons and munitions. It's the quantity. This article explains how they don't have many fighter pilots
Israel has something like 35000 people in it's air force. That's a tiny air force. Most of those people are going to be in some type of support role. The article talks about the most elite squadron being only 40 people. Losing one person is arguably a bigger loss than the plane. After all, doesn't matter if you have a plane if no one can fly it